Domain & Range
In the ordered pair (2,4) which variable represents the range?
4
Range, output, y
If the equation is y>mx+b, where would the shading go on the graph be?
above the line
A direct variation is a specific relationship in which there is a constant ratio (y/x)
What is the Direct Variation Equation?
Y=KX
What is slope intercept form?
y=mx+b
What is slope?
M=Rise/Run
In a function what variable cannot repeat?
X
We do not spend the block on our X's
What type of line would represent the inequality:
<
Dotted
True/False
If the line goes through the origin (0,0) it is NOT a direct variation
False
What is standard form?
Ax+By=C
What is the slope formula?
Y1-Y2/X1-X2
On a coordinate plane (graph), the horizontal line represents which axis?
Y-axis
When it comes to greater than and less than signs, the alligator always eat which number?
Larger
Does this equation represent a direct variation?
y=3x
Yes
Given the following information, write the linear equation in slope intercept form:
slope= -3 ; y-intercept= 2
Y=-3x+2
Find the slope:
(-7,8) and (-7,5)
Undefined
Which answer choice displays a function?
A. (4,2), (0,1), (-4,2), (0,4)
B. (-4,-2), (-2,1), (-4,3), (8,1)
C. (2,4), (1,2), (0,4), (3,7)
C. (2,4), (1,2), (0,4), (3,7)
No X's are repeating
What type of lines represents no solution?
Parallel
Does this equation represent a direct variation?
x+3y=15
No
Given the equation in standard form, you must convert the equation to slope intercept form:
2x+y=3
y=-2x+3
Find the slope:
(9,-4) and (1,-4)
Zero
What quadrant would ordered pair (-3,4) be in ?
2nd
What is the solution:
5(4+2x)=30
1
Find the missing variable of the direct variation:
(12,y) and (4,7)
y=21
If you buy a carwash at the gas station for $5.00, the cost per gallon is $3.10. If you have $40, write and solve a linear equation to find the number of gallons of gas you can afford.
x=11.29 gal
Given the equation in standard form, convert it into slope intercept form:
4x+5y=-30
y=4/5x-6